/Engine/Source/Runtime/Engine/Public/Net/VoiceConfig.h
These functions retrieve a pointer to a VOIPTalker associated with a specific player, if there is one available.
static [UVOIPTalker](API\Runtime\Engine\Net\UVOIPTalker) * GetVOIPTalkerForPlayer ( const [FUniqueNetIdWrapper](API\Runtime\CoreOnline\Online\FUniqueNetIdWrapper) & InPlayerId )